<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="vue.js"></script>
</head>
<body>

    <div id="root">
        <input type="text" v-model="msg">
        <p>{{msg | filterA}}</p>
    </div>

    <script>
        Vue.filter("filterA" ,function(value){
            return value.split(" ").join("")
        })
        new Vue({

            
            el:"#root",
            data:{
                msg:"d 的     的      的",

            }
        })


    </script>
    
</body>
</html>